Gas-motor.



No. 7l2,393.

Patented Oct. 28, I902. j' L. A. C. LETOMBE.

GAS MOTOR (Application filed June 1, 1901.)

(No Moder.)

l Ze'onAbeL Lkl rletombc.

fiyjuks' 01110712495.

LEON ABEL; cELER LETOMBE, or

P TENT Grates.

PARIS, FRANCE.

AS-Moron.

srnotrxcar'tonrm ming art of LettersiPa-tentlto. fizeeeQdated October 28, 1902.

Application filed June l, 1901.

To all whofit it imoty concerrt: i i

Be it. knowrft'that I; LEON ABEL CELEB. LE- TOMBE, a citizen-of the Republic of Frances and a resident of Nofl2l Rue deLondres;

Paris, inthe Republic of'France,have invent-i ed certain new and Z useful Improvements in Gas or Explosive Engines, of which the fol lowingis a specification. r

Thisinvent'ion constitutes an improvement in the mode of regulation of gas-motors described in United SlaIe'sLettersPatent No 634,063. The system of distribution orregu-l lation described in said patent is based upon; the principle of supercompression, which consists, essentially, in reducingthe force ofI the charges admitted when the resistance to be encountered tends to become reduced be-j low its maximum by a supercoinpression caused by the augmentation of the-volume of explosive mixture admitted to the cylinder combined with reduction of the percentage of gas in the said mixture in proportion as the said admissions are increased. volume ofthe mixture admitted being larger and the chamberof compression not having changed, the compression at the end of the compression stroke isof course higher, and that constitutes the supercompressiomwhich facilitates the burning of the poorermixture and increases the efliciency.

In the present invention I retain the prin-" ciple of supercompression, but provide a different organization of devices for regulating the character and volume of the mixture admitted to the cylinder. A valve under control of a regulator or governor of any suitable type by its variable opening causes antomatic suction of the required quantityof gas, which grows proportionally less as the quantityof air increases. 7 I obtain thereby a methodical and continuous regulation of mixture accordingto variations of load which the motor must overcome by themere control of the air-valve by the governor.

In the accompanying drawings,'Figure 1 is a view, partly in side elevation and section, of an engine-cylinder and pertinent associated parts; Fig. 2, ade tailview illustrating the air-valve, and Fig. 3 a diagram illustrating the operation of the system of control.

The shaft 0, from which the regulator de- The serial 62,596. (N0 model.)

duce by its oscillation a change of section nearly proportional to the angle ofoscillation. Its position depends upon the action lof regnlator X, shown an ordinary ballgovernor, which acts onthe spindle offthe valve through the medium of levers 10 and 11.

"-The"valves A and G'may-be opened by cams Q and Z-on the shaft 0 at the beginning of the suctionsti'ok e and may each remain open'throughout the length of the stroke, although 'thecam Z shouldbe so arranged as to disengage the valve G a little before the end of the stroke.

Whenthe motor is running at normal speed or with a maximum load, the valve V closes the air-inlet sufliciently so that the depression resulting from the suction will bring the compression curve tointersect the atmospheric line at about the middle of the stroke. It may be seen from the diagram that the suction curve will in this case (a f) show a continuous depression and that the compression curve f be d will intersect the atmospheric line about the middle of the stroke. The 'complete diagram will be a. f b c d e a slightly different from that of Patent No. 634,063.

As long as the motor is running with normal load the area of the-air-inlet remains small and the depressionwhich takes place in chamber 0 sucks in the gas strongly through the valve G. The cocks U are set so that the supply of gas at this moment may give the maximum explosion.

- When the power required from the machine diminishes, the regulator'X revolves faster and its sleeve Y moves, drawing along the lever 10, which makes valve V turn around, so as to provide for the air a larger inlet-section. The access of the increased volume of air to the chamber 0 diminishes the depresvice's may derive their motion, may revolve.

sion therein, and consequently a smaller quantity of gasis sucked into the chamber through the valve G. At the same time, the total quantity of the mixture drawn into the chamber 0 and admitted to the cylinder by valve A being larger than in the first case,

the compression will intersect the atmos-' pheric line earlier, so as to-obtain such a diagramas af' 1) c d e a.

At the limit when the valve V is quite open compression begins on the atmospheric line at the end of asuction stroke and the diagram a e c d a is obtained.

It may be seen thus that regulation is effected according to the principle of supercompressi0n--that is to say, by increasing the volume of mixture admitted to the cylinder and diminishing the percentage of gas therein as the load on the engine decreases.

The operation is performed with a more perfect continuity than in the organization shown in Patent No. 634,063 and in a simpler way by merely regulating the area of the air-inlet, because the decrease of gas is produced automatically by variations of depression in chamber 0.

Racing of the engine on a suddenlarge reduction in the load is prevented by the sleeve Y of the regulator drawing the cam Z out of engagement with the stem of valve G, which will then remain closed.

The drawingscontemplate that an addi tional cylinder or cylinders is to be arranged in. line with the one shown, and hence rods larger volume of air when the engine speed increases.

2. In an explosive-engine, a regulating system comprising a gas-inlet, its valve and means for operating it, an air-inlet and its valve so constructed and operated that the area ofv its opening is increased to supply a larger volume of air when the engine speed increases.

3. In an explosive-engine, aregnlating system, comprising means for supplying gas, an

air-supply inlet and its valve so constructed and operated that the area of its opening is increased to supply a larger volume of air when the engine speed increases.

In witness whereofI have hereunto set my hand in presence'of two witnesses.

LEON ABEL OELER LE'IOMBE. Witnesses:

PAUL HERVE, ANTOINE LAVOIX. 

